Lock construction



, Jan. 21, 1930. H. F. KElL I LOCK CONSTRUCTION Filed April 22, 1926 Patented Jan. 21, 1930 UNITED STATES PATENT OFFICE HENRY F. KEIL, F SCARSDALE, NEW YORK, .ASSIGNOR- TO FRANCIS KEIL & SON, INC., A CORPORATION OF NEW YORK LOCK CONSTRUCTION Application filed April 22,

This invention relates to lock construction. One of the objects thereof is to provide a lock which is secure and reliable in the highest de gree. Another object is to provide a lock construction wherein unauthorized access to the operating mechanism is dependably guarded against. Another object is to provide a lock of the cylinder type wherein removal of the cylinder by one not in possession of a proper key, thereby to gain access to the operating mechanism, is effectively prevented. Another object is to provide means for locking the cylinder which is practical and thoroughly efficient. Other objects will be in part obvious or in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements, and arrangements of parts as will be exemplified in the structure to be hereinafter described and the scope of the application of which will be indicated in the following claims.

In the accompanying drawing, in which is shown one of the various possible embodimentsof this invention,

Figure 1 is a view on a small scale of a portion of the outer side of a door and door frame with which the lock mechanism is associated;

Figure 2 shows the upper portion of the lock casing in section;

Figure 3 is a side elevation of the upper portion of the lock casing, the casing being partly broken away and the night bolt being shown in extended position;

Figure 4 is a view from the left of Figure 3;

Figure 5 shows the parts of Figure 4 in an other position;

Figure 6 is a section taken along the line 66 of Figure 2;

Figure 7 is a section taken along the line 7 7 of Figure 4E, and

Figure 8 is a section taken along the line 8-8 of Figure 7, the parts being shown in larger detail.

Similar reference characters refer to simi lar parts throughout the several views of the drawing.

Referring now to the drawing in detail, there is shown in Figure 1 a portion of a 1926. Serial No. 103,711.

door 10 coacting with a door frame 11 and having mounted therein a lock mechanism contained within a casing which is outlined by the dotted lines 12. This lock mechanism includes a latch 13 which is capable of being operated by the door knob 14. A night bolt is operated by a key through lnechanism contained within a cylinder 16, as will presently be described more in full. The lock casing 12 also preferably contains mechanism whereby the latch 13 is locked against movement by the door knob 14 and mechanism whereby the latch 13 may be retracted by turning the key in the cylinder 16; but these latter mechanisms will not be described in detail herein since they may take any of various well known forms.

Referring now to Figures 2 and 6, the lock casing 12 is seen to be inserted in a recess formed in the door 10. The casing includes what may be termed a face plate 17 which rests against the edge surface of the door, preferably substantially flush therewith. This face plate 17 may extend above and below the body of the casing 12, as indicated in Figure 1, and screws may be passed through these upper and lower portions of the plate 1'7 into the door to assist in securing the lock mechanism in place.

As best shown in Figure 6, the cylinder 16 passes through a recess 18 drilled into the door 10 and is threaded into an opening 19 in the side of the casing 12. A similar threaded opening 20 is preferably provided in the opposite side of the casing so that the cylinder may be threaded into the casing from either side as desired to suit the conditions met with in installing the lock. This cylinder 16 will not be described in detail herein since the particular construction thereof by itself forms no part of the present invention. However, it may be noted that this cylinder is of the usual type adapted to receive a key of the usual cylinder type and contains tumblers adapted to cooperate with the key. Projecting from the inner end of the cylinder is an arm 21 which is turned by the proper key to operate the lock mechanism.

In Figure 2 the night bolt 15 is clearly shown, being illustrated in this figure as in its innermost or retracted msition. The bolt is provided with a suitable mechanism to be actuated by the arm 21 of the cylinder for extending and retracting the bolt. This mechanism may take any well known form and is not shown nor described in detail herein, being indicated generally in Figure 2 by the numeral 22.

The cylinder 16, as has been mentioned, projects outwardly to the outer side of the door through the recess 18. It will be seen that, if the cylinder 16 is removed by threading the same out of the casing 20, the actuating mechanism 22 of the lock may be operated by inserting the finger of the hand or any suitable implement in through the recess 18. It is therefore important that the cylinder 16 be locked dependably against removal.

As best shown in Figures 2 and 6, there is provided within the casing 12 a horizontally slidable member 23 which is supported in slots 24 and 25 formed in the side walls of the casing. This member 23 is provided at its left-hand end with an upright part or flange 26 through which is a threaded opening receiving a screw 27 This screw 27 is supported in a lug 28 formed integral with the casing 12 and its outer end projects part way through the face plate 17, being provided with a slot 29 through which it may be turned by means of a screw driver or similar implement. The screw 27 is freely rotatable in the lug 28 but is prevented from axial movement therein by a pin 30 engaging with a circumferential groove 31 in the screw. The inner end of the member 23 is shaped to provide a pair of fingers 32 and 33, which fingers slide respectively in the slots 24 and 25.

In the threaded surface of the cylinder 16 is provided an axial groove 34 with which the end of the finger 32 is adapted to engage. A similar groove 35 is provided in the cylinder 16 diametrically opposite the groove 34:, this groove 35 being adapted to coact with the finger 33 in case the cylinder is threaded into the casing from the opposite side, that is, into the opening 20 thereof.

With the parts positioned as shown in the drawing, it will be seen that the member 23 dependably locks the cylinder 16 against turning and hence against unthreading and removal. The member 23 may be moved to release or engage the groove 34 of the cylinder by suitably turning the screw 27.

In the outer side of the face plate 17 is formed a groove 36 which is preferably of a depth substantially half the thickness of the plate 17 and which is provided with undercut walls. The outer end or head of the screw 27 is accessible at the base of this groove 36, the screw projecting through the plate 17 substantially to the base of the groove and at the upper end thereof. In this groove 36 is fitted a vertically slidable plate member 37 provided with suitable depressions 38 in its outer surface which may be engaged to facilitate sliding thereof. This slide 37 is dovetailed into the undercut walls of the groove 36 so that it is held therein and cannot be removed therefrom in an outward direction.

As shown in Figure 2, when the slide 37 is in its uppermost position, it conceals and renders inaccessible the head of the screw 29. The lower end of the slide comes substantially flush with the top edge of the opening in the plate 17 through which the bolt 15 slides. Thus, when the bolt is in retracted position, as shown in Figure 2, the bolt pre vents moving of the slide 37 downwardly to give access to the screw. In the upper edge of the bolt 15 is formed a transverse slot 39. When the bolt is moved outwardly to extended position this slot 39 comes beneath the slide 37 and theslide may then be moved downwardly to expose the screw 27. The parts are shown in this latter position in Figures 3 and 5.

Thus, the screw 27, by means of which the cylinder 16 may be released, is rendered positively inaccessible except when the bolt 15 is moved to its extended position. Moreover, since the face plate 17 faces the door frame 11 or a bolt-receiving mechanism thereon, access cannot be gained to the screw 29 except when the door is swung open, in addition to the requirement that the bolt be extended. A further advantage is that the lock mechanism cannot be placed in operation without moving the slide 37 into position to conceal the screw 29 for, while the slide 37 is in its downward in operative position, the bolt 15 cannot be retracted.

Referring now to Figures 7 and 8, the slide 37 is preferably provided with a detent which yieldingly holds it in its upper operative position so that it cannot accidentally slide down and interfere with the normal operation of the bolt 15. Preferably the back side of the plate 37 is recessed and secured thereto as by a pin 40 is a leaf spring 4-1 which is provided with a rounded projection 42 adapted to take into a notch 43 formed in the plate 17 at the base of the groove 36. This arrangement permits the slide to be moved conveniently while preventing its accidental displacement. The slide 37, moreover, is preferably fitted relatively tightly within the guiding ways therefor formed by the undercut side walls of the groove 36; his arrangement contributes in frictionally holding the slide 37 in its intended position, while at the same time its sliding movement is not impeded.

It will thus be seen that there has been provided in this invention a mechanism and apparatus in which the objects hereinbefore set forth and many thoroughly practical advantages are successfully achieved. It will be seen that the action of the apparatus is thoroughly dependable and reliable, and that the important advantages of placing the removal of the key-receiving mechanism under the control of the key-operated mechanism itself is achieved in a thoroughly practical and efficient manner.

As many possible embodiments may be made of the above invention and many changes might be made in the embodiment above set forth, it is to be understood that all matterhereinbefore set forth or shown in the accompanying drawing, is to be interpreted as illustrative and not in a limiting sense.

I claim as my invention:

1. In a lock construction, in combination, a casin containing a lock mechanism, a cylinder threaded thereinto adapted to reccive a key and having means adapted to be operated by said key to operate said lock mechanism, means for locking said cylinder against unthreading, said lastmeans having a part accessible from the exterior of said casing and operable for removing said locking means from said cylinder, and means for concealingsaid part, said means comprising a device slidably mounted upon said casing.

2. I11 a lock construction, in combination, a lock mechanism coacting with a door and including a casing, a bolt adapted to be moved outwardly from saidcasing to engage the door frame, said casing having a movable portion adapted to be moved relative to the remainder of said casing, a. cylinder threaded into said casing having means adapted to coact with a key and means to be operated by said key to move said belt, a device to lock said cylinder against unt'hreading, said device being operable to release said cylinder for removal of said cylinder from the casing and being underneath said movable portion of said casing, and means under the control of said key means for permitting movement of said movable portion away from its position over said device.

3. In a lock construction, in combination, a casing containing a lock mechanism, a cylinder threaded thereinto adapted to receive a key and having means adapted to be operated by said key to operate said lock mechanism, means adapted to engage said cylinder within said casing to lock said cyl inder against unthreading, a screw extending into said casing from the outer side thereof adapted to be turned to move said locking device into or out of engagement with said cylinder, and means associated with the outer side of said casing for normally preventing access to the head of said screw, said means being capable of being moved to give access to said screw only when said bolt is moved out wardly.

4. In a lock construction, in combination, a lock casing, a bolt movable into and out of said casing, a cylinder threaded into said casing adapted to receive a key and having means adapted to be operated by said key to move said bolt, means entering said casing from the outer side thereof having a part at the inner end thereof for locking said cylinder against unthreading, said means being operable for moving said locking part into or out of engagement with said cylinder, and a device associated with the outer side of said casing normally rendering said last means inaccessible, said device being capable of being moved to give access to said means only when said bolt is moved outwardly from said casing.

5. In a lock construction, in combination,

a lock casing, a bolt movable into and out of said casing, a cylinder threaded into said casing adapted to receive a key and having means adapted to be operated by said key to move said bolt, a screw entering said casing from the outer side thereof having a part at the inner end thereof for locking said cylinder against unthreading, said screw being adapted to be rotated to move said locking part into or out of engagement with said cylinder, and a device normally rendering the head of said screw inaccessible, said device being capable of being moved to give access to said screw only when said bolt is moved outwardly.

6. In a lock construction, in combination, a lock casing, a bolt movable into and out of said casing, a cylinder threaded into said casing adapted to receive a key and having means adapted to be operated by said key to move said bolt, means entering said casing from the outer side thereof having a part at the inner end thereof for locking said cylinder against unthreading, said means being operable for moving said locking part into or out of-engagement with said cylinder, and a slidable plate secured to the outer side of said casing normally rendering said last means inaccessible, said plate being slidable to give access to said means only when said bolt is moved outwardly.

7. In a lock construction, in combination, a lock casing, a bolt movable into and out of said casing, a cylinder threaded into said casing adapted to receive a key and having means adapted to be operated by said key to move said bolt, means entering said casing from the outer side thereof having a part at the inner end thereof for locking said cylinder against nnthreading, said means being operable for moving said locking part into or out of engagement with said cylinder, and a slidable plate secured to the outer side of said casing normally rendering said last means inaccessible, said plate being slidable to give access to said means only when said bolt is moved outwardly, said plate being dovetailed into said casing and the outer surface thereof resting substantially flush with the outer surface of said casing.

8. In a lock construction, in combination, a lock casing secured to a door, said casing including a plate facing toward the door frame, a bolt within said casing and n'iovable outwardly through said plate to engage a part on the door frame, a device passing through an opening in the door and entering an opening in said casing, said device having means adapted to receive a key and having means adapted to be operated by said key to move said bolt, means extending through said plate and having at its inner end a part adapted to lock said device against removal from said casing, said last means being adapted to be operated from the outer side of said plate to release said device, and a member adapted normally to render said last means inaccessible, said member being capable of being moved to permit access to said means only when said bolt is moved outwardly.

9. In a lock construction, in combination, a lock casing secured to a door, said casing including a plate facing toward the door frame, a bolt within said casing and movable outwardly through said plate to engage a part on the door frame, a device passing through an opening in the door and entering an opening in said casing, said device having means adapted to receive a key and having means adapted to be operated by said key to move said bolt, means extending through said plate and having at its inner end a part adapted to lock said device against removal from said casing, said last means being adapted to be operated from the outer side of said plate to release said device, and a member secured to the outer side of said plate and adapted normally to render said last means inaccessible and adapted to be moved to permit access to said means, said bolt having a part positioned in the path of movement of said member when said bolt is in retracted position thereby preventing movement of said member to give access to said means, said part of said bolt being moved out of the path of said member when said bolt is moved outwardly.

10. In a lock construction, in combination, a lock mechanism coacting with a door and including a casing, a bolt adaptedto be moved outwardly from said casing to engage the door frame and a device removable from said casing having means adapted to coact with a key and to be operated by said key to move said bolt, and means adapted to lock said device against removal, said means being oper able to release said device and accessible only when said door is open and said bolt is moved outwardly.

11. In a lock construction, in combination, a lock casing secured to a door, said casing including a plate facing toward the door frame, a bolt within said casing and movable outwardly through said plate to engage a part on the door frame, a device passing through an opening in the door and entering an open ing in said casing, said device having means adapted to receive a key and having means adapted to be operated by said key to move said bolt, means extending through said plate and having at its inner end a part adapted to lock said device against removal from said casing, said last means being adapted to be operated from the outer side said plate to release said device, and a member slidably mounted upon the outer side of said plate and adapted in operative position to cover said last means, a part of said bolt being positioned in the path. of said member when the bolt is in retracted position thereby preventing sliding of said. member to expose said means, said bolt having therein a notch which when the bolt is extended moves into the path of movement of said member thereby permitting sliding of said member to expose said means.

12. In a lock construction, in combination, a lock casing secured to a door, said casing including a plate facing toward the door frame, a bolt within said casing and movable outwardly through said plate to engage a part on the door frame, a device passing through an opening in the door and entering an opening in said casing, said device having means adapted to receive a key and having means adapted to be operated by said key to move said bolt, means extending through said plate and having at its inner end a part adapted to lock said device against removal from said casing, said last means being adapted to be operated from the outer side of said plate to release said device, and a member secured to the outer side of said plate and adapted normally to render said last means inaccessible and adapted to be moved to permit access to said means, said bolt having a part positioned in the path of movement of said member when said bolt is in retracted position thereby preventing movement of said member to give access to said. means, said part of said bolt being moved out of the path of-said member when said bolt is moved outwardly, said member being slidable on said plate and being dove-tailed thereinto to prevent removal of said member in an outward direction.

13. In a lock construction, in combination, a lock casing secured to a door, said casing including a plate facing toward the door frame, a bolt within said casing and movable outwardly through said plate to engage a part on the door frame, a device passing through an opening in the door and entering an opening in said casing, said device having means adapted to receive a key and having means adapted to be operated by said key to move said bolt, means extending through said plate and having at its inner end a part adapted to lock said device against removal from said casing, said last means being adapted to be operated from the outer side of said plate to release said device, and a member secured to the outer side of said plate and adapted normally to render said last means inaccessible and adapted to be moved to permit access to said means, said bolt having a part positioned in the path of movement of said member when said bolt is in retracted position thereby preventing movement of said member to give access to said means, said part of said bolt being moved out of the path of said member when said bolt is moved outwardly, and means yieldingly holding said member in its normally operative position.

14. In a lock construction, in combination, a lock mechanism coacting with a door and including a casing, a bolt adapted to be moved r outwardly from said casing to engage the door frame, a cylinder threaded into said casing having means adapted to coact with a key and means to be operated by said key to move said bolt, a device for locking said cylinder against removal from said casing, said device having an outer part to be operated for releasing said cylinder, a member for concealing said part, said member being capable of being moved only upon a predetermined movement of the bolt, and means for yieldingly holding said member against accidental movement thereof when in released position.

15. In a lock construction, in combination, a lock mechanism adapted to coact with a door and including a casing, a bolt adapted to be moved outwardly from said casing for engaging the door frame and a device removable from said casing having means adapted to coact with a key and to be operated by said key to move said bolt, means adapted to lock said device against removal, and a member for preventing operation of said last-mentioned means, said member being movable in a direction toward said bolt and said bolt being shaped to prevent movement of said member excepting when said bolt is extended.

16. In a lock construction, in combination, a lock mechanism adapted to coact with a door and including a casing, a bolt adapted to be moved outwardly from said casing for engaging the door frame and a device removable from said casing having means adapted to coact with a key and to be operated by said key to move said bolt, means adapted to lock said device against removal, and a member mounted upon the outer side of said casing and adjacent said bolt for normally preventing operation of said last-mentioned means, said member being movable in a direction toward said bolt and said bolt having a recess into which said member is movable, said recess being positioned to receive said member only when said bolt is moved outwardly from said casing.

17 In a lock construction, in combination, a lock mechanism adapted to coactwith a door and including a casing, a bolt adapted to be moved outwardly from said casing for engaging the door frame and a device removable from said casing having means adapted to coact with a key and to be operated by said key to move said bolt, means accessible from the outside of said casing for locking said de- HENRY F. KEIL.

CERTIFICATE OF CORRECTEUN,

Patent No. 1,744,167. Granted January 21, 1930, to

HENRY F. KEIL.

It is hereby certified that error apgears in the printed specification 0f the abeve numbered patent reqeirieg correetien as foliews: Page 2, line N31, for the Words "in operative" read "iueeerative"; and that the said Letters Patent should be read witii this correction therein that the same may conform to the record of the case in the iatent Office. 7

Signed and sealed this 6th day Of May, A. D. 1930.

, M, J. Moere, (Seal) Acting Gemmiesieeer of Patents. 

